According to a job posting in Idylla, several heirlooms have been lost in the sewers below the city: an idol, a mason's hammer, and a brooch. In all cases, the owners claim seeing sprites carry them off.

Take the entry labeled "Hoarders in the Sewer" from the Idylla Sewers contract board.

Find the three items:

Brooch Heirloom: From the Western Henge (teleportation point while in the sewers), head west then north to find the brooch in a pile in the corner of the next room. Kill the sprites that attack when you pick it up.

Mason's Hammer: From the Primos's Entrance, head west and then around and up a bit to find the hammer in a pile. Kill the sprites that attack when you pick it up.

Idol: NE of the Southern Henge (teleportation destination while in the sewers). Go around the stairs to the left when facing them. After you pick up the idol, several sprites will attack.